checkpoint -- started doing some R4 encryption support

git-svn-id: svn+q:///qpdf/trunk@807 71b93d88-0707-0410-a8cf-f5a4172ac649

1 files changed, 27 insertions, 0 deletions

diff --git a/libqpdf/qpdf/Pl_AES_PDF.hh b/libqpdf/qpdf/Pl_AES_PDF.hh
new file mode 100644
index 00000000..6939abb8
--- /dev/null
+++ b/libqpdf/qpdf/Pl_AES_PDF.hh
@@ -0,0 +1,27 @@
+#ifndef __PL_AES_PDF_HH__
+#define __PL_AES_PDF_HH__
+
+#include <qpdf/Pipeline.hh>
+
+class DLL_EXPORT Pl_AES_PDF: public Pipeline
+{
+  public:
+    // key_data should be a pointer to key_size bytes of data
+    static unsigned int const key_size = 16;
+    Pl_AES_PDF(char const* identifier, Pipeline* next,
+	       bool encrypt, unsigned char* key_data);
+    virtual ~Pl_AES_PDF();
+
+    virtual void write(unsigned char* data, int len);
+    virtual void finish();
+
+  private:
+    void flush(bool discard_padding);
+
+    bool encrypt;
+    unsigned int offset;
+    static unsigned int const buf_size = 16;
+    unsigned char buf[buf_size];
+};
+
+#endif // __PL_AES_PDF_HH__